from itsdangerous import TimedJSONWebSignatureSerializer as TJSWSerializer
from django.conf import settings

#1,加密openid
def generate_sign_openid(openid):
    #1,创建TJSWSerializer对象
    serializer = TJSWSerializer(secret_key=settings.SECRET_KEY,expires_in=300)

    #2,加密数据
    sign_openid =  serializer.dumps({"openid":openid})

    #3,返回数据
    return sign_openid.decode()


#2,解密openid
def decode_sign_openid(sign_openid):
    #1,创建TJSWSerializer对象
    serializer = TJSWSerializer(secret_key=settings.SECRET_KEY,expires_in=300)

    #2,解密数据
    try:
        dict_data =  serializer.loads(sign_openid)
    except Exception as e:
        return None

    #3,返回openid
    return dict_data.get("openid")